Question

QUESTION THREE (a) (i) With the aid of a well labeled diagram, explain four components of a heat pump. (8 marks) (ii) Explain the two operation modes of a GSHP. \( (4 \) marks) (b) A GSHP with COP \( =4 \) is to provide 80 kW of thermal energy to maintain a room at \( 25^{\circ} \mathrm{C} \). If the outdoor air temperature is \( 42^{\circ} \mathrm{C} \), determine: (i) the fabric heat gain/ loss \( (4 \) 2 ? marks) (ii) extracted/deposited heat to/from the outside. (4 marks) (c) Show that \( \mathrm{COPhp}_{\mathrm{hp}}=\mathrm{COPr}_{\mathrm{r}}+1 \) (5 marks) (d) Determine the input power requirement if the GSHP in 1(b) above is operating in the cooling mode. (4 marks)

          QUESTION THREE
(a)
(i) With the aid of a well labeled diagram, explain four components of a heat pump.
(8
marks)
(ii) Explain the two operation modes of a GSHP.
\( (4 \)
marks)
(b) A GSHP with COP \( =4 \) is to provide 80 kW of thermal energy to maintain a room at \( 25^{\circ} \mathrm{C} \). If the outdoor air temperature is \( 42^{\circ} \mathrm{C} \), determine:
(i) the fabric heat gain/ loss
\( (4 \)
2
?
marks)
(ii) extracted/deposited heat to/from the outside.
(4
marks)
(c) Show that \( \mathrm{COPhp}_{\mathrm{hp}}=\mathrm{COPr}_{\mathrm{r}}+1 \)
(5
marks)
(d) Determine the input power requirement if the GSHP in 1(b) above is operating in the cooling mode.
(4
marks)

QUESTION THREE
(a)
(i) With the aid of a well labeled diagram, explain four components of a heat pump.
(8
marks)
(ii) Explain the two operation modes of a GSHP.
(4
marks)
(b) A GSHP with COP =4 is to provide 80 kW of thermal energy to maintain a room at 25^∘C. If the outdoor air temperature is 42^∘C, determine:
(i) the fabric heat gain/ loss
(4
2
?
marks)
(ii) extracted/deposited heat to/from the outside.
(4
marks)
(c) Show that COPhphp=COPrr+1
(5
marks)
(d) Determine the input power requirement if the GSHP in 1(b) above is operating in the cooling mode.
(4
marks)

Added by Marvin T.

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